Answer:
At the end of the vowel, the soft palate (is lowered) so that the air flows out the (nasal passage). At the same time, the BACK of the tongue rises to articulate with the VELUM, preventing air from escaping through the MOUTH. The lips remain OPEN. The vocal folds continue to SOUND.
Explanation:
This is the way in which sound is produced in any language through the use of our organs of speech called articulators.
NOTE:
This question should be in English Category not Engineering. I believe that was an oversight from your end.